Mechanism for making rotary brushes



Ngvfll 1924.

- L. H. NIELSEN MECHANISM FOR MAKING ROTARY-5 BRUSHES 2 Sheets-Sheet 1 Filed April 20, 1921 INVEN TOR. [mu-[7 5 H emf/ 1e.

Nov. 11 1924 5 4;!

L. NIELSEN MECHANISM FOR MAKING HiDTART-BRUSHES Filed April 20, '1921 2 Sheets-Sheet 2 I N VEN TOR.

Zap/r175 Herr/k fl l Ase/1 ATTORNEYS Patented Nov. 11, 1924.

trans LAUR'I'I'S HENTRIK NIELSEN, O33 KOLDING, DENMARK, ASSIGNOR TO THE OSBORN MANUFACTURING GOD/IPANY, HF CLEVELANI); QHIO, A CORPORATION OF OHIO.

MECHANISM FOR MAKING ROTARY BRUSHES.

Application filed April 20, 1921.

T 0 aZZ whom it may "concern Be it known that I, LAURITS HENRIK NIELSEN, a subject of the King of Denmark, and a resident of Kolding, Denmark, have invented a new and useful lmprm'ement in Mechanism for Making Rotary Brushes, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other in ventions.

The present inprovements, relate, as in dicated, to the manufacture of rotary brushes such as are widely used for inclustrial purposes wherein a plurality of layers or sections of brush, material are assembled together to provide a brush of desired thickness, i. e., with a face of desired width. In such brushes the base of each section is usually a wire ring, about which the brush material, i. e., bristles, strands of line wire, or the like, is doubled so as to extend therefrom in a general radial direction.

An improved form of such brush section is shown and described in my co-pending application, filed April 18,1921, Serial No. 462,431, in which a flat spacing ring is interposed between the doubled brush material just outside of the base ring, and such material is then secured to such flat ring by stitching 'or equivalent means.

The object of the present invention is to provide a simple and expeditious mechanism or device for assembling the materials that compose a brush section of the general character just "described, and particularly one constructed in the special manner last referred to. The invention accordingly is considered to consist of the means hereinafter fully described and particularly pointed out inthe claims, the annexed drawings and the following description setting forth in detail certain means and one mode of carrying out the invention, such disclosed means and mode illustrating, however, but one of various ways in "which the principle of the invention may be used.

In said annexed drawings Figs. 1 to 3, inclusive, illustrate in cross section the appearance of an individual brush section in successive stages of manufacture; Fig. dis a broken side elevation of such section int-the stage of manufacture comprises two complementary 1 Serial No. 462,831.

illustrated in Fig. 3; Fig. 5 is a side elevation of my improved device or mechanism designed for use in making brush sections of the character shown in the preceding figures; Fig. 6 is 'atransverse section thereof taken on the plane indicated by the line 66, Fig. 5; Fig. 7 is a central longitudinal section of the same, the plane of the section being indicated by the line 77, Fig. 6; F 1g. 8 is a view similar to Fig. 7 but showmg the parts in a different operative position; and Fig. 9 is an elevation showing part of a brush section.

In the section or layer-as illustrated in Figs. 1 to 4, inclusive, it will be noted that the fibrous material 2 is bent around a ring formed wire 1 into open Ushape, the free ends of the material extending'radially outwardly from such ring. Between the respective outwardly bent ends of the brush material there is placed a flat ring 3' of pasteboard or equivalent material of approximately the same thickness as said wire 1, such brush material being thereupon pressed against such fiat ring and held firmly in place by means of one or more rows of stitching 4.

As shown in Figs. 8 and 9a pair of annular plates 5 are temporarily applied to the respective sides of the brush material after the latter has been preliminarily distributed upon the base ring, and the flat spacing ring has been inserted. The inner diameter of said plates is large enough to clear the greater portion of such fiat spacing ring so that the stitching may be readily accomplished while the material is held in proper place by the plates. In order to facilitate the handling of the brush section when thus held between the plates 5, pivotal fasteners 6 adjacent the edges thereof are provided, such fasteners being formed to overlap and clamp the two sections together when pressed against the edge of the plates.

For the purpose of distributing the brush material on the base ring or wire 1, and at the same time bend such wire into desired circular shape, the speciallyconstructed mandrel illustrated in Figs. 5 to 8, in, elusive, has been devised. This mandrel sections 10 and 11, that, in the illustia ve construetion shown, are designed to, be mounted on the end 12 of rotating shaft or arbor corresponding sleeve into the position shown.

13. Such end is of somewhat reduced diameter compared with the arbor, and a shoulder 14: surrounds the arbor adjacent. such reduced end and forms an abutment, against which mandrel section is forced when the two sections are drawn together by means of the nut 15 on the threaded extremity of such reduced end 12. One or more pins or dowels 16 and corresponding holes 17 on the juxtaposed faces of the two mandrel'sections serve non-rotatahly to secure said sections together, i. e., prevent individual turning movement thereof about the arbor whenl they are secured thereon in the fashion just described.

The mandrel sections are formed with complementary inwardly beveled edges 10 and 11, whereby a peripheral groove is pro vi'ded when said sections are brought together in the fashion just described. At corresponding points in the juxtaposed faces of the sections, adjacent the bottom of such groove, are small inset plates 10" and 11 of hardened steel adapted to firmly grip or bite the end of the wire introduced therebetween so as to carry the same around with the mandrel as it is rotated, in the operation of the machine, as will be presently described. Longjitud'inally slidably mounted on the respective mandrel sections 10 and 11 are two corresponding flanged sleeves 20 and 21 that are secured to said sections, respectively, so as to rotate therewith by dowels 2-2 and 23 on the latter,

respectively engaging apertures 24 and 25 in said sleeves. The flanges on such sleeves are disposed adjacent the outer faces of the disk-like portions of the mandrel sections which form the aforementioned groove, and said flangesfurthermore extenda trifle beyond such portions and are undercut so as vto peripherally overlie the latter when brought closely against the portions in question, thereby more or less closing the groove, (see Fig. 8). The edges of such overlying portions 26 and 27 of the flanges are serrated, as best shown in Fig. 5, so that the brush material is maintained in evenly distributed conditionabout the entire periphcry of the mandrel when the sleeves are closed in the fashion just described Such serrations are also preferably continued across the outer cylindrical faces of such flanges.

Movement of the sleeves20 and 21 upon the respective mandrel sections is effected by means offnuts 30 and 31 threaded u on the ends of said sections and provided with small clamps 32 and 33 that engage cir cumferential grooves 34- and 35 in said mandrel sections. The nuts are provided with handles 36' and 37 whereby they may be conveniently rotated, such rotation in one direction obviously serving to withdraw the again.

in Fig. 7, while rotation in the opposite direction moves such sleeves together to more or less close the groove, as shown in F 8.

Having thus described the construction of my improved device, its mode of operation may be readily set forth. Referring to Fig.

6 more particularly, the end of the wire from which the base ring 1 of the brush section is to be formed is brought between the plates 10" and 11 inset in the juxtaposed faces ot the two mandrel sections, and by tightening nut 15 on the end of the arbor such wire is there firmly gripped. The sleeves 20 and 21 are at this stage of operati on in their outermost position, as shown in Figs. 5 and 7. Thereupon the operator 'akes a quantity of loose brush material in his hand, and simultaneously with the rotation of the mandrel distributes such material between the groove and the wire to form a layer of desired thickness. As the rotation of the mandrel continues such layer of material is carried along and bent into the open V-shape shown in Fig. 7 until,

a complete circle of the material is formed; The wire is then out off and the'ends twisted or otherwise joined together. It is at'this stage that the fiat spacing ring 3 of'pasteboard or like material, where such a ring is utilized, is inserted, such ring of course requiring to be transversely broken atone point in its circumference to permit such insertion. Next the sleeves 20 and 21 are moved together by turning the handles 36 and 37, thus doubling the brush material so that the respective portions thereof lie substantially parallel, as shown in Fig. 8. 'lhereupon a pair of annular plates 5 are applied to the respective sides of the circle of such material and such plates locked together by means of fasteners 6. Upon now unscrewin nut 1 the outermost of the two mandrel sections, with the parts carried thereby, is removed from the end of the arbor and the brush sect-ion can be taken off. Such brush section at this stage of manufacture is complete, save for the stitching which is accomplished on a suitable sewing machine or any other means for attaching the bristles or other brush material in their doubled over condition to the base ring and flat spacing ring, where the latter is utilized, may of course be employed The annular clamping plates 5 are then removed and the brush section is ready for assembly into a complete brush.

After the brush section has been thus removed, the outersection of the mandrel may then be replaced on the arbor and the de vice is ready for another operation. It will be understood ot course that theannular clamping plates 5 are used over and over It will also be noted that, as previously pointed out, the brush material is held in proper radial position and equally distributed about the base ring or wire pending the application of such plates 5 by the serrated edges of the flanges 26 and 2? on the respective sleeves '20 and 21. The brush section produced on the foregoing device is accordingly of uniform thickness throughout and the tangling of the material is substantially entirely eliminated even where such material consists of fine hairs or light gauge brass wire.

The even distribution of the brush material is facilitated by the serrations on the flange of sleeves 20 and 21, inasmuch as these tend to feed such material at a uniform rate between the wire and the groove in the mandrel. To assist in regulating the feeding of the material, a plurality of pairs of markers 4C0 equidistantly spaced about the flanges are provided. The operator being instructed to distribute between successive markers a. measured quantity of material, finds it relatively easy to avoid over thick and over thin places. These markers moreover, preferably take the form of transverse projections or ribs, as shown, whereby they serve the further purpose of supporting the annular clamping plates concentrically upon the mandrel, while still allowing the internal diameter of such plates to be sufficient to clear the required space about the inner edge of the brush section (see Fig. 6) for stitching.

Other modes of applying the principle of my invention may be employed instead of the one explained. change being made as regards the means herein disclosed, provided those stated by any one of the following claims or their equivalents be employed.

I therefore particularly point out and distinctly claim as my invention 1. In mechanism of the character described, a mandrel comprising two sections axially movable relatively to each other and formed with complementary inwardly beveled edges, whereby a peripheral groove is provided when said sections are brought together, said sections being respectively provided at opposite oints in the bottom of such groove with hardened faces adapted to grip the end of a wire.

2. In mechanism of the character described, a mandrel comprising two sections axially movable relatively to each other and formed with complementary inwardly beveled edges, whereby a peripheral groove is provided when said sections are brought together, said sections being provided with in terlocking elements adapted to secure the same against independent rotative movement when thus brought together.

3. In mechanism of the character described, the combination of a mandrel comprising two separable sections formed with complementary inwardly beveled edges, whereby a groove is formed when said secrespectively and having flanges adapted to extend over such groove to laterally compress a layer of brush material held therein,

such flanges having serrated edges whereby such material is retained in proper position.

l. In mechanism of the character clescribed, the combination of a mandrel comprising two separable sections formed with complementary inwardly beveled edges, whereby a groove is formed when said sections are brought together, and independent annular plates adapted to pass over said mandrel-sections and to be removably clamped against opposite sides of a doubled layer of brush material held in such groove.

5. In mechanism of the character described, the combination of a mandrel comprising two separable sections formed with complementary inwardly beveled edges, whereby a groove is formed when said sections are brought together, independent annular plates adapted to pass over said mandrel-sections and to be clamped against opposite sides of a doubled layer of brush material held in such groove, fastening means carried by said plates adapted to secure the same in such material clamping position, and radial projections on said sections adapted to support and properly space said plates thereon.

6. In mechanism of the character described, the combination of an arbor formed with a shoulder spaced from its end, two complementary mandrel-sections mounted on said arbor and formed with complementary inwardly beveled edges adapted to form a peripheral groove when said sections are brought together, the outer such section being removable, and means adapted to secure said mandrel-sections together on such arbor and to said arbor for rotation therewith.

7. In mechanism of the character described, the combination of an arbor formed with a shoulder spaced from its end, two complementary mandrel-sections mounted on said arbor and formed with complementary inwardly beveled edges adapted to form a peripheral groove when said sections are brought together, the outer such section being removable, means adapted to secure said mandrel-sections together on such arbor, and sleeves axially movable upon said mandrelsections respectively and having flanges adapted to extend over such groove to laterally compress a layer of brush material held therein.

8. In mechanism of the character described, the combination of an arbor formed with a shoulder spaced from its end, two complementary mandrel-sections mounted on said arbor and formed with complementary inwardly beveled edges adapted to form a I peripheral groove when said sections are brought together, the outer such section being removable, means adapted to secure said mandrel-sections together on such arbor, sleeves axially movable upon said mandrelsections respectively and having flanges adapted to-extend over such groove to laterally compress a layer of brush material held therein, and nuts'threaded upon each of said mandrel-sections and rotatively engaging the corresponding sleeve, whereby the latter 10 may be advanced or retracted asdesired.

Signed by me, this 13th day of April,

LAURITS HENRIK NIELSEN. 

